Cooling of cylindrical bodies



' liiliiiliiiIlII IIIIEIIIIIIIIIIL! 1.1.! 1.! IIIIIIIIIIIII Filed June9, 1938 I I l I I I I I I I I I I R S GORMAN ET AL COOLING OFCYLINDRICAL BODIES IIIIIIIIIIII III July 25 1939 Ju y 25, 1939. I R 5ORMA ET AL v 2,167,504 I 1938 2 Sheets-Sheet 2 Patented July 25, 1939UNITED STATES PATENT OFFICE COOLING OF GYLINDRIGAL BODIES Raymond S.Gorman, Dormont, and Ralph E. Graham, Grafton, Pa., assignors toCliflord B. Ferree, Pittsburgh, Pa.

Application June 9, 1938, Serial No. 212,746 1 Claim. (01. 266-65 Thisinvention relates to the cooling of cylinin plan from above, and partlyin horizontal secdrical bodies of metal, and finds practical applition.Certain parts shown in Fig. I are not prescation in the formation bycooling of a chill upon ent in the showing of Fig. II. Fig. III is afragthe barrel of a forged steel roll. Its general apmentary view tolarger scale, illustrating in side 5 plicability to the formation ofchills upon cylinelevation and in vertical section certain details 5drical bodies will be manifest. The objects in of structure. Fig. IV isa view in section, on the view are quality, depth, and uniformity ofchill plane indicated by the line IVIV, Fig. III.

throughout the extent of the cylindrical body. Fig. V is a fragmentaryView in horizontal sec- In Letters Patent of the United States. No.tion, illustrating the relative positions of the roll 2,044,384, grantedto Clifford B. Ferree, for surface and the spraying apparatus. 10 Methodof and apparatus for cooling rolls, a spray A roll l stands on end on aturn-table 3. It

jacket is shown and described. The spray jacket will be understood thatthis roll has been brought is a double-walled cylindrical shell, oflength corto high temperature in a suitable furnace, and responding toor somewhat exceeding that of the has been quickly taken from thefurnace and barrel of the roll to be cooled, and of an internal set incentered position upon the turn-table. It 15 diameter such as to receivethe roll with small is very hot, and the purpose of the apparatus isclearance. The inner wall of the jacket is perfoto project upon itssurface uniformly everywhere rated with a multitude of small, closelyset, evena constantly renewed surge of water of uniform, 1y distributedorifices; and from these orifices, and (necessarily) of relatively low,temperature.

when the apparatus is in service, jets of water The apparatus includes,in combination with 20 are projected upon the surface of a hot roll thatthe turn-table 3, the spraying device. This conhas been brought to placewithin the jacket, and sists of a cage whose bars 4 extend verticallythat stands, rotating upon a turn-table. The and stand in cylindricalassembly, surrounding problem to which the invention of the said Fertheroll in place on the turn-table. The bars are ree patent is addressed isthe problem of fiowhollow, for the conveyance of water; they are 25 inguniformly over every unit of area of the provided each with a line oforifices 4|, opening surface of the roll barrel, at maximum rate, andtoward the roll body; they stand spaced at a at uniform temperature, thecooling stream of uniform interval from the roll body; and they water.are spaced apart, at equal intervals one from It has been found that, inaparticular installaanother. The hollow bars of the cage advan- 30 tion,the chilling effect upon the rolls was not, tageously take the form oflengths of pipe of as had been intended, uniform. Investigationelongate, and specifically of oval cross-section revealed the fact thatit was the lower portion (approximating sector shape), set with themajor of the roll as it stood within the cooling appa axis in radialposition with respect to the. axis ratus that was less perfectly chilledthan the of the roll, and with the small end inward. Thus 35 upperportion; and the fact was perceived that, maximum capacity is combinedwith maximum because of the narrowness of the interval at space intervalbetween cage bars. Conveniently which the jacket was spaced from theroll surthe bars 4 are built into a cage structure that inface, therewas a glutting of the way of escape eludes upper and lower headers 46 ofannular of the heated water downward, and that, in 0011- form, and tothe two headers alike water under 40 sequence, the Withdrawal of heatproceeded at suitable pressure is supplied by appropriate conmore rapidrate at the upper than at the lower nection, as the drawings show. Theheaders are end. of the roll body. It is to the overcoming of so spacedand arranged that in the assembly the that difliculty, and to therealizing in fullest barrel of the roll is positioned wholly betweenmeasure of the benefits and advantages of the them, so that thoughoutall its extent the barrel 45 method and apparatus of the Ferree patentof the roll may be played upon by jets from the named above that thepresent invention is adorifices in the bars. dressed. 'Figs. III and IVserve to show details of suit- In the accompanying drawings Fig. I is aview, able structure. The headers are box-like strucpartly in sideelevation, partly in vertical section tures built of plates, and thepipes 5 at their ends 50 of roll-cooling apparatus in which the present(conveniently swedged to circular shape) are invention is embodied. Inthis figure certain welded in openings of corresponding shape in partsare broken away; and a roll is shown, in the header walls. coolingposition within the apparatus. Fig. II Other features shown in thedrawings are ciris a fragmentary View of the apparatus, partlycumstantial, merely, and not essential to this 55 invention. The roll isshown to be provided with an axial bore, and a nozzle 5 is provided forprojecting a stream of cooling water into the bore. A perforated plug I2is shown set within the bore at the lower end, whose effect is to causethe water supplied to the bore to over- How and pour over the surface ofthe upper neck of the roll.

In operation multitudinous jets of water properly distributed impingeupon the roll surface and take up heat. The heated water passes freclyaway between the bars of the cage. There is no glutting, no arrest ofthe escape, no interference by accumulation of hot water with thecooling eflect of the jets, either toward the lower end of the roll orelsewhere. The escaping water falls and may be gathered in a basin 39.Thence it may be carried away through a line 10 and, if desired, aftercooling, may be returned again (as by a pump, not shown) through thewater supply connection 42.

Water ordinarily will be the cooling medium; manifestly, it sufficesthat it be a liquid.

We claim as our invention:

Apparatus for applying to a heated cylindrical body of metal aninundating flood of cooling liquid, such apparatus consisting of acylindrical cage of hollow, vertically extending, spacedapart barsprovided with inwardly and radially directed orifices, together withmeans for maintaining the bars flushed with liquid under pressure, thecage being adapted to surround and to stand at an interval from thesurface of the vertically standing cylindrical body to be cooled, thebars of the cage being of oval shape in crosssection and being assembledwith the major axes of the ovals extending in radial direction, theparts being so proportioned that quantities of liquid, injected throughthe orifices and impinging upon the surface of the cylindrical body,pass freely away between the bars, without glutting.

RAYMOND S. GORMAN. RALPH E. GRAHAM.

